Raspberry plant named ‘PS-1764’

ABSTRACT

This invention relates to a new and distinct everbearing variety of raspberry plant named &#39;PS-1764&#39;. The new variety is primarily adapted to the growing conditions of the central coast of California and is characterized by the following. Fruit that is very large in size, light in color, glossy with very large druplets. Fall fruit production that begins late with low July-August yields. Primocanes are medium to long in length, large in diameter, medium to light green in color producing very little to no waxy coat and little to no anthocyanins. Thorns are strong and stout in texture with little to no reddish color on the tip.

Classification: The variety is botanically known as Rubus idaeus.

Varietal denomination: The new raspberry plant has the varietal name of‘PS-1764’.

BACKGROUND OF THE INVENTION

The present invention relates to a new and distinct fall bearingraspberry variety designated as ‘PS-1764’. This new variety is a resultof a controlled cross between ‘PS-127’ (U.S. Plant Pat. No. 7,437) and‘Heritage’ (unpatented).

The seedling resulting from the aforementioned cross was selected from acontrolled breeding plot near Watsonville, Calif. After its selection,the new variety was further asexually propagated in Monterey County andSanta Cruz County, Calif. by dormant canes, roots and non-dormant rootshoot cuttings. The new variety was then extensively tested over thenext several years in fruiting fields in Monterey County and Santa CruzCounty, Calif. This propagation has demonstrated that the combination oftraits disclosed herein as characterizing the new variety are fixed andremain true to type through successive generations of asexualreproduction.

BRIEF SUMMARY OF THE INVENTION

‘PS-1764’ is primarily adapted to the climate and growing conditions ofthe central coast of California. This region provides the necessaryyear-round temperatures required for it to produce and maintain a strongvigorous plant with consistent fruit production from July throughNovember on primocanes and in the ensuing year from May through July onthe floricanes. The nearby Pacific Ocean provides the needed humidityand moderate temperatures to maintain fruit quality during theproduction months. The new variety possesses the following traits incombination distinguishing it from other known and closely relatedcommercial varieties in the region. The varieties which we believe to bemost closely related to ‘PS-1764’ are ‘PS-1070’ (U.S. Plant Pat. No.11,073), and ‘PS-1049’ (U.S. Plant Pat. No. 10,142).

COMPARISON TO SIMILAR VARIETIES

In comparison to the similar variety ‘PS-1049’, ‘PS-1764’ differs by thefollowing combination of characteristics. ‘PS-1764’ fall fruitproduction begins later with lighter July-August production as comparedto ‘PS-1049’. Floricane fruit production typically is slightly heavierin May yet similar in July as compared to ‘PS-1049’. Primocanes arelarger in diameter with laterals that are shorter in length as comparedto ‘PS-1049’. Primocanes of ‘PS-1764’ also differ by producing verylittle to no waxy coat on the surface as compared to ‘PS-1049’ whichproduces a strong waxy coat. Thorns are slightly shorter in length yetmuch more abundant along the cane as compared to ‘PS-1049’. Thorn tipsof ‘PS-1764’ are very light red-purple in color as compared to ‘PS-1049’which tends to be medium red-purple. The foliage of ‘PS-1764’ isslightly darker green in color and slightly more broad than long ascompared to ‘PS-1049’. ‘PS-1764’ has nearly always 3 leaflets per leafas compared to ‘PS-1049’ which tends to be nearly equally 3 to 5leaflets per leaf. Leaf shape of ‘PS-1764’ tends to be mostly ovatewhile ‘PS-1049’ tends to be more cordate in shape. The fruit of‘PS-1764’ is larger in size, lighter in color with larger yet fewerdruplets per berry as compared to ‘PS-1049’. The skin is slightly weakeryet glossler than ‘PS-1049’. Seeds are also larger in size as comparedto ‘PS-1049’.

In comparison to the similar variety ‘PS-1070’, ‘PS-1764’ differs by thefollowing combination of characteristics. ‘PS-1764’ fall fruitproduction begins much later with lighter July-August production ascompared to ‘PS-1070’. Floricane fruit production typically is slightlylighter in May yet heavier in July as compared to ‘PS-1070’. Primocanesare taller in height, larger in diameter with laterals that are slightlylonger in length as compared to ‘PS-1070’. Primocanes of ‘PS-1764’ alsodiffer by producing very little to no waxy coat on the surface with alsolittle to no anthocyanins as compared to ‘PS-1070’ which produces amedium waxy coat with medium anthocyanins. Thorns are slightly longer inlength yet much more abundant along the cane as compared to ‘PS-1070’.Thorn tips of ‘PS-1764’ are very light red-purple in color as comparedto ‘PS-1070’ which tends to be medium red-purple. The foliage of‘PS-1764’ is slightly darker green in color, slightly more broad thanlong with longer petioles as compared to ‘PS-1070’. Leaf shape of‘PS-1764’ tends to be mostly ovate while ‘PS-1070’ tends to be morecordate in shape. The fruit of ‘PS-1764’ is much larger in size, moreconical in shape with larger druplets per berry as compared to‘PS-1070’. The skin is slightly weaker yet glossier with better overallappearance than ‘PS-1070’. Seeds are also larger in size as compared to‘PS-1070’.

In comparison to the parent variety ‘PS-127’, ‘PS-1764’ differs by thefollowing combination of characteristics. ‘PS-1764’ fall fruitproduction begins later with a lighter total fall yield. Floricane fruitproduction also begins later than ‘PS-127’. ‘PS-1764’ fruit size, seedsize and druplet size are much larger as compared to ‘PS-127’. Thefoliage of ‘PS-1764’ is slightly darker green in color and slightlylarger in overall size as compared to ‘PS-127’. The leaf cross-sectionof ‘PS-1764’ is less convex as compared to ‘PS-127’.

In comparison to the parent variety ‘Heritage’, ‘PS-1764’ differs by thefollowing combination of characteristics. ‘PS-1764’ fall fruitproduction begins later with a lighter total fall yield. ‘PS-1764’ fruitsize, seed size and druplet size are much larger as compared to‘Heritage’. The foliage of ‘PS-1764’ is slightly more broad than longand slightly larger in overall size as compared to ‘Heritage’. ‘PS-1764’has nearly always 3 leaflets per leaf as compared to ‘Heritage’ which ismostly 3 to 5 leaflets per leaf.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying color photographs show typical specimens of the newvariety at various stages of development as nearly true as it ispossible to make in color reproductions. The depicted plant and plantparts were approximately 6 to 9 months old:

FIG. 1 is a photograph of fruit taken in the month of June;

FIG. 2 is a photograph showing typical fruit characteristics taken inthe month of September;

FIG. 3 is a photograph showing typical leaf characteristics taken in themonth of August;

FIG. 4 is a photograph of primocane foliage taken in the month of June;and

FIG. 5 is a photograph showing typical primocane and flowercharacteristics taken in the month of September.

DETAILED BOTANICAL DESCRIPTION

The following description of ‘PS-1764’ unless otherwise noted, is basedon observations taken in Watsonville, Calif. These measurements andratings were taken from plants dug from a nursery located in MontereyCounty, Calif. during the middle of November and planted approximately 3to 4 weeks later in Watsonville, Calif. The approximate age of theobserved plants were 8 to 9 months old. Yield observations and fruitquality characteristics are averaged from data collected during the 1998through 2002 production seasons. The phenotypical descriptions,measurements and color designations stated for the new variety may vary,depending upon variations in environmental factors, including weather(temperature, humidity and light intensity), day length, soil type,location and cultural conditions. ‘PS-1764’ has not been observed underall possible environmental conditions. Color terminology where notedfollows the Munsell Book of Colors, Munsell Color, Baltimore, Md.(1976).

FRUIT CHARACTERISTICS

TABLE 1 1998-2002 average market fruit yield and fruit sizecharacteristics of ‘PS-1764’ with standards from Watsonville,California. Character ‘PS-1764’ ‘PS-1049’ ‘PS-1070’ Primocane Yield 265512 860 July-August mean (gm/pl) Primocane Yield 1864 1721 1510 SeasonTotal mean (gm/pl) Floricane Yield 117 45 189 May mean (gm/pl) FloricaneYield 811 856 390 July mean (gm/pl) Floricane Yield 2526 1740 1613Season Total mean (gm/pl) Primocane Fruit Size 3.7 2.8 2.4 mean (gms)Floricane Fruit Size 3.6 2.5 2.2 mean (gms) Fruit was harvested fromJuly through October (primocanes) and May through July (floncanes).

TABLE 2 Comparison of mature fruit characteristics of ‘PS-1764’, withstandards from Watsonville, California, Sep. 18, 2002 Character‘PS-1764’ ‘PS-1049’ ‘PS-1070’ Munsell Color 7.5R 3/12 to 4/12 5R 3/6 to3/8 7.5R 4/10 to 3/10 Range mature fruit Fruit Length 2.3 2.2 1.8 mean(cm) Fruit Width 2.1 2.0 1.8 mean (cm)* Fruit Length/ 1.1 1.1 1.0 WidthRatio Calyx Diameter 2.8 2.6 2.4 mean (cm) Druplets/Berry 68 79 62 meanSeed Weight 1.6 1.3 1.4 mean (mgs) *Width is measured across the widestpart of the berry, typically across the shoulders

TABLE 3 Comparison of 1999-2002 primocane fruit quality characteristicsof ‘PS-1764’ with Standards from Watsonville, California.* Character‘PS-1764’ ‘PS-1049’ ‘PS-1070’ Skin Firmness 7.8 8.7 8.3 Fruit Appearance8.0 8.0 7.8 Fruit Gloss 8.2 7.6 7.8 *Results are averaged from 4 yearsof replicated fruit quality test performed from August through October1999-2002. Ratings are based on a scale from 1-10; the higher therating, the stronger the skin and more attractive and glossy the berry.

Fruit:

Size.—Large to very large.

Ratio of length/width.—Slightly longer than broad.

Predominant shape.—Conical.

Color of mature fresh fruit.—Light red.

Evenness of color.—Even.

Glossiness.—Strong.

Adherence of recepticle.—Very weak.

Firmness of flesh.—Firm to very firm.

Firmness of skin.—Weak to medium.

Recepticle size.—Medium to medium-large.

Core cavity size.—Medium large to large.

Druplet size.—Medium to large.

Druplet arrangement around the berry.—Slightly irregular.

Primocane time of fruiting.—Late.

Floricane time of fruiting.—Medium.

Type of bearing.—Everbearing.

PLANT CHARACTERISTICS

TABLE 4 Comparison of mature cane characteristics of ‘PS-1764’ comparedwith standards from Watsonville, California. Character ‘PS-1764’‘PS-1049’ ‘PS-1070’ PRIMOCANE August 31, 2002 Munsell Color Range 5GY6/6 to 5/6 5GY 7/4 to 6/4 5GY 6/6 to 7/6 Length 1.8 1.9 1.4 mean (m)Lateral Length 35.9 67.8 24.1 mean (cm) Basal Diameter 13.8 12.8 11.5mean (mm) Canes/Crown 2.6 2.4 3.2 Cane Diameter 12.6 11.4 9.0 central ⅓mean (mm) Fruiting Laterals 16.8 16.3 13.6 per cane of cane fruiting30.2 40.5 37.7 Internode length 3.6 5.1 4.3 central ⅓ mean (cm) ThornLength 2.0 2.3 1.8 central ⅓ mean (mm) Thorns/cm 9.4 3.3 4.2 central ⅓mean FLORICANE May 30, 2002 Munsell Color Range 5YR 3/6 to 4/6 5YR 4/4to 4/6 5YR 5/4 to 6/4 Length 1.49 1.2 N/A mean (m)

Plant:

Habit.—Erect to very erect.

Density.—Medium dense to dense.

Size.—Medium large to large.

Productivity.—High.

Root development.—Root development initiated in about 1 to 3 months.

Primocanes/floricanes:

Primocane color.—Medium to light green yellow.

Primocane anthocyanin coloration.—Absent to very weak.

Primocane thorn density.—Many.

Floricane color.—Medium to dark yellow brown.

Production of waxy coat.—Very thin to none.

Young shoots:

Number.—Medium.

Anthocyanin coloration.—Absent to very weak.

Thorn density.—Strong.

Thorns:

Color (tip).—7.5RP 5/4 very light reddish purple.

Color (base).—Light green yellow.

Texture.—Rigid.

Attitude of the tip.—Horizontal.

FOLIAGE CHARACTERISTICS

TABLE 5 Comparison of mature leaf characteristics of ‘PS-1764’, comparedwith standards from Watsonville, California, Aug. 15, 2002 Character‘PS-1764’ ‘PS-1049’ ‘PS-1070’ Munsell 7.5GY 2/4 to 3/4 7.5GY 3/4 to 4/45GY 3/4 to 3/6 Color Range (upper surface) Munsell 5GY 6/2 to 7/2 5GY5/4 to 6/4 5GY 5/4 to 6/4 Color Range (lower surface) Terminal 13.8 14.914.2 Leaflet length mean (cm)* Terminal 10.9 10.2 9.7 Leaflet width mean(cm)* Terminal 1.3 1.5 1.5 Leaflet ratio (L/W) Petiole Length 7.4 7.25.7 mean (cm) Petiole Width 3.5 3.2 3.1 mean (mm) Rachis 4.6 4.5 4.1Length** mean (cm) Thorns/Petiole 16.8 18.6 12.3 mean Stipule Length 9.810.1 8.8 mean (mm) Lateral 12.0 12.1 10.8 Leaflet basal pair length mean(cm) Lateral 7.2 7.2 7.0 Leaflet basal pair width mean (cm) *Terminalleaflets measurements are taken from a 3 leaflet leaf. **Rachis length =length between the terminal leaflet and the adjacent lateral leaflets ofa 3 leaflet leaf

Foliage:

Color of upper surface.—Medium to medium dark green.

Color of under side.—Light to pale grey green.

Shape in cross section.—Flat to strongly convex.

Arrangement.—Compound.

Relief between veins.—Medium to strong.

Glossiness.—Medium.

Number of leaflets/leaf.—Mostly to always three.

Terminal leaflet:

Size.—Medium to large.

Shape.—Ovate.

Length/width ratio.—Longer than broad.

Shape of base.—Cordate.

Shape of tip.—Acuminate.

Margins.—Biserrate.

Lateral leaflet:

Size.—Medium to large.

Shape.—Ovate.

Overlapping.—Touching to free.

Orientation.—Opposite.

Shape of the base.—Obtuse.

Shape of the tip.—Acuminate.

Margins.—Biserrate.

Rachis length.—Long.

Petiole:

Texture.—Pubescence.

Thorn orientation.—Erect.

Anthocyanin coloration.—Absent to very weak.

Stipule orientation.—Erect.

FLOWERS

TABLE 6 Comparison of mature flower characteristics of ‘PS-1764’,compared with standards from Watsonville, California, Aug. 23, 2002Character ‘PS-1764’ ‘PS-1049’ ‘PS-1070’ Calyx Diameter 3.0 2.6 2.1 mean(cm) Petal Length 7.5 6.9 6.6 mean (mm) Petal Width 4.4 3.5 2.9 mean(mm) Petal Ratio (L/W) 1.7 2.0 2.3 Petals/Flower 5.0 5.1 5.0 meanSepals/Flower 5.3 5.0 5.1 mean

Flowers:

Color.—White.

Size.—Medium to large, about 3 cm.

Size of calyx relative to corolla.—Larger.

Relative position of petals.—Free.

Petal length/width ratio.—Longer than broad to much longer than broad.

Reproductive organs:

Pistils.—Average 60 to 90 per flower and medium to large in size.

Stamens.—Average 90 to 130 per flower and medium to large in size.

Hardiness: Winter hardiness and drought/heat tolerances were notobserved.

Pest reactions: This new variety may not be resistant to any of theknown insects, diseases or viruses common in California. It is known tobe moderately susceptible to the two-spotted spider mite. It is alsoknown to be moderately susceptible to powdery mildew and highlysusceptible to yellow rust. The susceptibility of the new variety to anyof the virus complexes of California has not been determined.

I claim:
 1. A new and distinct raspberry plant as herein described andillustrated by the characteristics set forth above.